Ride control truck



Jan. 20, 1948. E. J. MAATMAN Er AL RIDE CONTROL TRUCK Filed lax-ch 26. 1945 2 SheetsPSheet l l l l l I N VUV TORS @g55/i O] Wlan/bua @Kaus dlemer ('/aen dfH-n im ly in section,

2.436.868 EIDE CONTROL TRUCK Egbert J. Eastman and Claus J. Werner Clasen.

me Foundries, Jesse! Chicago,

to American Steel lll., a corporation of New Munition March 26, 1945, Serial No. 58h79!) 28 Clam. (Cl. 10S-19'!) This invention relates to a railway car truck and more psrticidsrly to aride control truck of quick wheel charlie type embodying novel friction means for dampening the vertical oscillations of the An-oblect of oury invention is to devise a rallway-cartruck such as that described wherein the friction means of friction shoes mounted inV each end of the bolster with each shoe having frietional engagement with ,the adjacent sideframecolumns and wherein resilient means associated with both shoes support the same. and other resilient means independently associated with each shoe are operative to urge the shoes into friotional cnsagcment with the columns of theside frames.

Another object of our invention is to design a truck such as thatdescribed, wherein the bolster and associated friction means may be readily disassembled from'the side frames so as to accommodate a quiokwheerchange byl elevating boisteropening and removing with the bolster. A e In one form of our invention. we have illustrated the friction shoes as being supported on a semlelliptic spring afforded a seat along the longitudinal center line of the bolster end on the bottom wall of the'boister, amiin a modification of ourinvention the friction shoes are supported between two semielliptic springs with the springs being respectively seated on the top and bottom wallsof the bolster'along'the longitudinal center line of the bolster'and wherein in each of these forms of our invention each shoe is provided with a coil spi'lng adapted to urge the shoe into frictional engagement with the adjacent column of the side frame. In the modification Yof our invention, the friction shoes are actuated into frictionai engagement with "the side-'frame columns by the coil fspringgto dampen relatively great oscillations of the bolster and the semlclliptic springs supporting the -shoes are adapted to permit small oscillations of the bolster without actuation ofthe friction shoes.

In the drawings:

Figure l is a fragmentary side eievation. partoi' a car truckincorporating our invention, saidl sectional view being taken approximateiy inthe longitudinal vertical plane bisecting theslde frame as indicated by the line i--I of Figure 2:

bolster Figure 2 is a fragmentary top plan view of the car truck shown in Figure 1. partly in section, the view being taken approximately in the planes indicated by the line I- of Figure 1 looking in the direction indicated by the arrows:

Figure 3 is a fragmentary sectional view through the bolster illustrated in Figures l and 2, the section being taken approximately in the longitudinal vertical plane bisecting the bolster as indicated by the line I-S of Figure 2;

Figure 4 is a fragmentary side elevation of the and the associated friction means;

Figures 5. 6, and l illustrate our novel friction shoe. Figure 5 being a top plan view thereof, Figure 6 a rear elevation thereof, and Figure 'l a side elevation thereof: and

Figure 8 is a fragmentary view showing a modiiicatlon of our invention. the view being comparable to that shown in Figure 1 and the left half of the view being in section along a plane like that of Figure 1.

Referring first to the preferred form of our invention illustrated in Figures l-7. our novel car truck may comprise the side frame of well known truss type having a compression member 2, a tension member d, and spaced columns 0, l merging therewith to form a central bolster opening 8 and spaced window openings lli, il outwardly thereof. A bolster I2 is spring-supported as at Il fromV a plurality of long travel springs diagrammatically indicated at il, IU, said springs being positioned as at Il on` the spring seat portion of the tension member and between spaced upstandlng inboard and outboard danges 20 defining said seat portion.

The end portion of the bolster l2 may be of box section, having a top wall 22. a bottom wall 26, and spaced sidewalls 2B. 20, a vertical longi tudinal central rib 28 having at opposite sides thereof spaced inboard and outboard transverse webs Il and $2 defining with said top and bottom walls a friction shoe pocket Il in each side of the bolster end.

Within each pocket 34 maybe mounted a friction shoe Il having a plane vertical face in frictional engagement as at lil along the wear plate I! iixed in any conventional manner on the adjacent column t. The friction shoe in each pocket Il is shown in Figures 5-7 and is a generally rectangular block. said shoe comprising the friction wail I4 affording a plane friction surface Il for engagement with the adjacent side frame column. The inward side of each shoe is cored away centrally thereof to provide inboard and outboard portions Il, Il having opposed arcuate surfaces l0, l providing positioning means for one end of a coil spring 52 received therebetween and in abutment with the shoe, the other end of said spring bearing against the vertical central rib 28 of the bolster and receiving therewithin a boss 5I on said rib, said spring being operative to urge the shoe outwardly of the pocket 34 and the friction tace 40 oi the shoe into engagement with the wear plate 42 on the adjacent column. Each shoe is formed to provide an upper plane surface 5B having slidable engagement as at 58 with a corresponding surface on the bolster top wall 22. the shoes in respective pockets being urged into said engagement by a semielliptic spring l0 extendingthrough a horizontal slot 6| in the vertical center rib 28 oi the the inboard and outboard webs I0 and 32 of each pocket, the central portion o! said spring being seated on the bolster bottom wall 2l and the opposite ends thereof respectively having engagement as at N with a plane surface 62 on the bottom of each shoe Il, said surface 82 affording a slidable seat for the adjacent end oi the spring B. It will be apparent that, by this arrangement. the spring 80 will urge each shoe into engagement with the bolster top wall 22, as clearly shown in Figure 1. said bolster bottom wall 24 providing a seat on which the spring may fulcrum. It may be noted from Figures 5 and 7 that the upper and lower plane surfaces 56 and B2 of each shoe are oi substantial area. so that sufilcient bearing will be had against the bolster top wall 22 and the associated end oi' the spring Bil.

The body portion of each friction shoe may also be cored out as at 83 to accommodate a bar or pin which may be inserted therethrough and passed through aligned openings 85, 6l in the transverse walls and 32 oi each bolster pocket, thus affording means of retaining the friction shoes in assembly within the bolster.

the opposite bolster pocket.

The bolster i2 may have the usual inboard and outboard guide lugs IB and 68 for cooperation with the inboard and oi' the bolster to the top of the bolster opening and removal of the springs I6, the bolster may be lowered and removed from the side frame for eecting a quick wheel chang A modification f frame columnsI are identical with those previthe side frame and Y ously described and at |02, |02 with wear plates ontheir inner faces transverse walls and the top and bottom walls ill and ill oi' the bolster. The rear portion oi each shoe is provided with spacedside walls i20- receiving therebetween-one end ot the coli spring are supported on opposite sides thereof between the semielliptic springs |28, I2C, the top spring being received within a slot |20 within th tical longitudinal central rib |24 and seated cen-- It will be apparent that the semielilptie springs supporting the shoes will permit relatively small movements ot the bolster without actuation o! the friction shoes whereby during the operation of the car'. such movements will be are fragmentarily indicated LMI!! proving the riding qualities of the car while prolonling the useful life of the friction means.

As in the previous embodiment of our inventhe bolster is provided at opposite sides thereof with the inboard and outboard guide lugs Ill and Il! receiving the guide portions of the adlacent column therebetween. the outboard guide lugs il! being of less depth than the widened lower portion of the bolster opening l for the purposes vof quick wheel change as previously described, the shoes each being provided ill adapted to receive pin means (not shown) passing therethrough and aligned openings the transverse inboard and outboard walls il! and lll of each bolster pocket in the manner previously for retreating the with the side frames.

It is to be understood that we do not wish to be limited by the exact embodiments of the device shown which are merely by way of illustration and not limitation as various and other forms of the device will. of course. be apparent to those skilled in the art without departing from the spirit of the invention or the scope of the claims.

We claim:

l. In s. railway car truck, a side frame comprising compression and tension members and spaced columns defining a bolster opening, said tension member comprising a spring seat with spaced inboard and outboard flanges. a plurality of springs on said seat and conned between said flanges, a bolster supported on said springs in said opening. said bolster having a box section end portion with top and bottom walls and spaced transverse-webs merging therewith and defining a pocket in each side thereof and a central rib extending between said walls. spaced openings in said rib adjacent respective walls. friction shoes in said pockets. a semi-elliptic spring fulcrumed centrally of each of said walls in the adjacent opening, said springs having the opposite ends thereof slldably receiving said shoes therebetween for supporting the same. and resilient means compressed between said shoes and said central rib for urging said shoes into engagement with said columns.

2. In a railway car prising compression and tension members and spaced columns tension member comprising a spring seat with spaced inboard and outboard flanges. a plurality of springs on said seat and conilned between said bolster supported on said springs in having a box section spaced columns defining a bolster opening. said tension member comprising a spring seat with spaced inboard and outboard nanges. a plurality of springs on said seat and confined between said nantes, a bolster supported on said springs in described l pockets u a relatively movable bolster said opening, said bolster having a end portion with top and bottom walls and spaced transverse webs merging therewith and defining a pocket in each side thereof and a central rib extending between said walls, an opening in said rib adjacent said bottom wall, friction shoes in said pockets, a semi-elliptic spring fulcrumed cenin said opening and having the opposite ends thereof slidably suppressed for urging said shoes columns.

4. In a railway car truck, a side frame comprising spaced columns partly defining a bolster opening. a relatively movable bolster resiliently supported on said frame in said opening. said bolster having a box section end portion with top and bottom walls and spaced transverse webs merging therewith and denning a pocket in each between said walls, said rib comprising spaced openings therein adjacent-respective walls, friction shoes in said pockets, a resilient member fulcrumed centrally of each of said walls in the adlacent opening, said members having the opposite ends thereof receiving said shoes therebetween and slidably supporting the same. and resilient means between `said shoes and said central into frictional engagement with said columns, said resilient means and having variable capacicolumns relative to said bolster small oscillations of said bolster and movable with said bolster relative to said columns tively great oscillations of said bolster.

5. In a railway car truck. a side frame having tension and compression members and spaced columns defining a bolster opening, a bolster spring-supported from said tension member in said opening, said bolster having a. box section end portion with spaced top and bottom walls and transverse webs defining la pocket in each side of said bolster pockets, an opening shoes in said pockets, a resilient member fulcrumed centrally of said bolster in said opening and having opposite ends thereof respectively engaging said shoes and operatively urging the same into engagement with one of said walls, and coil springs compressed between said shoes and said central rib and operative to urge said shoes into frictional engagement with the 6. In a railway car truck, a side frame comprising spaced columns partly defining a bolster opening. a bolster resiliently supported on said frame in said opening. said bolster having s box section end portion with top and bottom walls and spaced transverse webs merging therewith and defining a pocket in each side thereof and a centrai rib extending between said walls, said rib comprising an opening thereinfriction shoes in said pockets in slldabie engagement with one of said walls, a resilient member fulcrumed centrally of said bolster in said opening and having opposite ends thereof enaginil respective shoes and operatively urging the same into engagement with the associated wall, and resilient means compressed between said shoes and said central rib and operative to urge said shoes into engagement with the adjacent columns.

7. In a railway car truck. a side frame having spaced columns partly defining a bolster opening, spring-supported on nascose said frame in said opening and friction means ocsaid walls intheldiment comin l saidfmem mounted in the end of said bolster for engagehere Y Ynimm f ment with said columns, said friction means comlaid shoes Myriam prising friction shoes pocketed in said bolster. the same, -and-resilientinsaneeF i Y debeand resilient members fulcrumed centrally theres tween said siicsalud-.said ccntrairih'for of from said bolster and having adjacent opposaid shoes into-engntiwith saidfcolmmns. site ends thereof in said pockets for sliclably sup- 12. In a Araliwaycar truck, asidedrsme 4hav-- porting the friction shoes therebetween. and reing spaced columns .,pantly"^denlng a Wholster silient means compressed between said shoes and opening. a-bolstersponrsaid frame operative to urge the same into trictlonal engagein in said opnlng. andirlction means mountedin ment with the adjacent column walls, said resiltheend of saidholsterei'or tenth-said lent means and members being so formed and c said friction meanscompslsigrfrlctlon arranged that relatively small oscillations of said shoes p wd insaidzholster, a resilient member lster eii'ect deflection of said resilient members tulcrumed centrally thereof Y said holster without actuation oi' said shoes. is at opposite sides of said yshoes, said resilient end of said bolster for engagement with said go same into engagement with the adjacent Vcoiumns.

said pockets for slidably supporting the friction g5 in said opening. and friction means mounted in ced l umn walls, said resilient members and said resilmembers fulcrumed centrally thereof from said ient means having variable capacities whereby so bolster and having Vtliemdiacent ends thereof relatively small oscillations of said bolster are slldnbly supporting the shoe in each pocket, and

9. In a railway car truck. a supporting member with 4the adjacent columns. Y having spaced columns defining an opening there- :lo 14. a railway car truck. -a side frame Vhsvin, a supported member spring-supported in said ingV spaced columns par g aV bolster opening, said supported member having a boxopening. a bolster -supported on said frame section end portion with top and bottom walls in said opening. and frieten-means mounted in each side thereof. a, central rib extending between 40 columns. Seid flililn means comprising friction said walls intermediate said pockets and having shoes pocketed in said bolster. a resilient member an opening therein. a resilient member fulfulcrumed intermediate the ends thereof from tion shoe in each pocket slldably seated on the between said shoes and operative to urge the adjacent end of said resilient member, and resame into engagement with the adacent column. silient means compressed between each shoe and 15. In a railway car truck, a side frame havsaid central rib and operative to urge said shoes ins spaced columns partly deilnins a bolster into engagement with the adjacent columns, 60 opening, a bolster spring-supported on said frame end of said bolster for engagement with said colss lengagement'with a wall thereof, a resilient mem- In a railway car truck, a side frame com- 0 5 opening and having an end with pockets thereand spaced transverse webs merging therewith 70 respective pockets for supporting the 811098 therecentral rib extending between said walls, said shoes into engagement with said columns rib comprising spaced openings therein adjacent 17. A bolster having a box-section end portion respective walls, friction shoes in said pockets, a comprising spaced top and bottom walls and resilient member fulcrumed centrally of each 76 spaced transverse webs merging therewith and operative to urge defining pocketed in sides thereof and slidably horizontal surfaces thereof, a, resilient member fulcrurned intermediate its ends on said supported member and urging each shoe into engagement with its associated surface, and resilient means compressed between said shoes and operative to urge said shoes into engagement with said columns.

19. In a railway vehicle, a supporting member having spaced vertical columns, a member springsupported from said tween said columns and having lateral pockets aligned with said columns, friction shoes in said pockets. supported member and operative to urge each shoe against a substantially horizontal surface on said supported member, and resilient means compressed between said shoes and operative to urge said shoes along said surfaces outwardly of said supported member into engagement with said columns. Y

20. In a railway vehicle, a supporting member having spaced vertical friction surfaces. a member spring-supported from said first-mentioned member between said surfaces and comprising a substantially horizontal face adjacent each surface, friction elements seated against respective faces, a resilient member fulcrumed from said supported member and operative to urge said shoes against respective means compressed between said elements and the same along said faces into frictional engagement with said surfaces.

said first-mentioned member between said columns with lateral pockets aligned with said columns, friction shoes in said pockets, spaced resilient members fulcrumed centrally thereof from said supported member and having adjacent ends thereof supporting the shoes in respective pockets. and resilient means intermediate said resilient members and compressed between said shoes for urging the latter into engagement with said columns.

22. In a railway car truck, a supporting member having spaced vertical friction surfaces. a relatively movable member spring-supported between said surfaces, friction shoes carried by said supported member adjacent respective surfaces, resilient elements and means mounted on said supported member for movement therewith relative to said supporting member, said resilient elements slidably engaging said shoes therebetween in spaced relation to said supported member, and said resilient means being disposed intermediate said elements and compressed between said shoes for operatively urging the latter into frictional engagement with said surfaces, said resilient elements and means having variable capacities whereby relative movement of said members is effective to move said shoes along said surfaces only after sufficient deflection of said elements to overcome the initial fric tional resistance to said movement shoes and surfaces induced by said resilient means.

23. In a railway car truck, a supporting member having spaced vertical friction surfaces. a relatively movable member spring-supported between said surfaces, friction shoes carried by said supported member adjacent respective surfaces, resilient elements and means within said supported member and movable therewith relative to said supporting member, said resilient elements positioning said shoes therebetween in spaced relation to said supported member and said resilient means being disposed intermediate said elements and compressed between said shoes for operatively urging the latter into frictional engagement with said surfaces, said resilient elements and means having variable capacities whereby said shoes are movablev along said surfaces upon relative movement of said members inducing a sufficient variation of the of said resilient elements to overcome the initial frictional resistance to said movement between said shoes and surfaces by said resilient means.

24. 1n a railway car truck. a supporting member having spaced vertical friction surfaces, a relatively movable member spring-supported between said surfaces. friction means carried by said supported member, said friction means comprlsing friction shoes adjacent respective surfaces, resilient elements above and below each shoe and compressed between said shoe and said supported member, resilient means compressed between said shoes and operative to urge said shoes into engagement with said surfaces, said resilient elements and means having variable capacities whereby relative movement ofsald members is effective to move said shoes along said surfaces only after deflection of said elements to overcome the initial frictional resistance to said movement between said shoes and surfaces induced by said resilient means.

25. In a railway car truck, a supporting member having spaced vertical friction surfaces, a relatively movable member spring-supported between said surfaces, friction means carried by said supported member, said friction means comprising friction shoes adjacent respective surfaces, and a plurality of resilient elements clasping and supporting said shoes in spaced relation to said supported member and compressed between said shoes and operative to urge said shoes into engagement with said surfaces, said resilient elements having variable capacities whereby said shoes are movable along said surfaces upon relaf` tive movement of said members inducing a sufficient variation of the capacities of said supporting elements to overcome the initial frictional resistance to said movement between said shoes and surfaces by said compressed elements.

26. In a railway car truck, a supporting member having spaced vertical friction surfaces, a relatively movable member spring-supported between said surfaces, friction means carried by said last-mentioned member, said friction means comprising a friction shoe adjacent each surface, vertically spaced resilient members receiving said shoe therebetween and compressed between the same and the adjacent portions of said supported member, and resilient means between said shoes and operative to urge the same into frlctionai engagement with said surfaces, said between said uns hevins variable ca ees are maintained 1n tions with said surfaces REFERENCES CITED oe adjacent each sur- The following reterences are of record ln the fece, vertically spaced resilient membersre u me nf his Paten ber laeving spaced verti relatively movable mem tween said surfaces.

ment with said surfaces. n 1,130,065 n supnortlnzmem- 2,053,989

-supported -be- 2.295.555 carried by 2.378.229

Name Date Keyser Oct. 29, 1946 Bullock Mar. 2. 1915 Goodwin Bent. 8. 1036 shsllenberzer Dec. 16. 1902 Cottrell Sept. 15. 1942 Light June 12. 1045 

